Chuck



June 28, 193s.

H. E. sLoAN Er Ax., 2,122,360

CHUCK Filed Aug. 24, 1956 2 Sheets-Sheet l y NTO@ I l 1 TOP/vtr June 28, 193.8.

H. E. SLOAN Er A1.

' CHUCK Filed Aug. 24, 1936 2 Sheets-Sheet 2 Patented June 28, 1938 UNITED STATES PATENT OFFICE CHUCK Harry E. Sloan, Hartford, and George A. Highberg', West Hartford, Conn., assignors to The Cushman Chuck Company, Hartford, Conn., a corporation of Connecticut Application August 24, 1936, Serial No. 97,496

9 Claims. (Cl. 279-121) rIhis invention relates to the class of devices the end f the hOllsirlg, seleWs being SllOWn which are employed for holding articles while herein as suitable means for this purpose. The operations are being performed thereon, and an plete I6 has a key i9 in the fOin 0f e Spline object of the invention, among others, is the Which engages in a grOOVe in the plete M, as production of a chuck which shall be particularly ShOWn in Fig. l 0f iJhe drawings. A meter 20 5 sensitive as to the force applied in the gripping of any desired type is secured to the base I8, and action and in which such force shall be evenly ffem the OlegOing deSCiiptiOn it Will be seen distributed; and e further object of the inventhat the motor and the Chuck are rigidly contion is to provide a chuek which Shah be parnected. In the construction herein shown the ticularly eicient in action. spindle is rotatably mounted and maybe driven in 10 One form of a chuck embodying the invenany suitable manner as by means of a pulley 2l, tion and in the construction and use of which the elthellgh in some instances it may be desired objects herein set out, as well as others, may 'D0 have the Spindle statienely. be attained isv illustrated in the accompanying A chuck jaw Operating rod 22 extends through 'drawings in which they sleeve I5 and is adapted for lengthwise rel5 Figure 1 is a view in lengthwise section through Ciprocating movement therein, the rear end 0f the chuck on a plane passing through the axis the rod having an actuator secured thereto, this thereof, actuator comprising a threaded actuating head Figure 21s an end View- 2?.'V with a corrugated shank Z4 and a threaded Figure 3 is a view in section on a plane denoted stem 25. The threaded stem fits a threaded hole 20 by the dotted line 3 .3 of Fig 1 in the end of the rod 22 and the corrugated shank Figure 4 is a similar view on a plane denoted ts a corrugated hole in the bottom of the housby the dotted line 4-,4 of Fig. 1. ing I1, a collar being secured to the shank be- Figure 5 is a, View in Side elevation and on retween a shoulder on the shank and the end of duced scale with the lengthwise central portion said rod. 25 broken out The thread on the head 23 is engaged with the Figure 6 is a View in lengthwise axial section, threaded surface of a hole in a chuck jaw actuon enlarged scale, through a portion of the chuck ating sleeve 26 rotatably mounted, as upon ball. body and on a plane `denoted by the dotted line bearings, in the chamber in the housing il and 3o 6 6 of Fig. 2'. in the motor base I8. Said sleeve is driven from 30 Figure 7 is e View in Cross Section on a, plane the spindle of the motor by a train of gears of denOted by the dotted line I-'I of Fig. 1. any suitable arrangement, as shown herein these Figure 8 is a view in cross section on a plane Comprising a DiniOn 27 0n said spindle meshing denOted by the dotted line v8 8 of Fig 1, on with a gear 28 on an arbor mounted .in the motor enlarged scale base and having a pinion 29 meshing with a gear 35 In the accompanying drawings the numeral l0 30 rigidly secured to a pinion 3! that meshes denotes a bearing constituting a, part of a mawith a gear 32 secured to the sleeve 28 and as chine in which the chuck is mounted and II deshOWn in Figs. 1 and 8 0f the drawings. notes a, ehuek Spindle to one end of which the From this construction it will be noted that chuck is secured, as by means of a cap l2, which rotation of the sleeve 26 will impart longitudinal 40 is fastened in any suitable manner to the chuck mol/'ement 00 the Chuck jew Operating Fed 22 fOr body I3, pins and screws being shown for seactuating chuck jaws in a manner now to be curing the cap to the spindle and screws for describedfastening the cap to the body, as shown in The rod 22 has secured at its front end a pri- Figure 1 of the drawings. A plate I4 is secured, mary chuck jaw actuating disk 33 resiproeatingly 45 as by means of screws, to the rear end of the InOLlnted in the Chuck body i3 and having g set spindle I I and a sleeve I5 is supported at its 0f chuck jaw clamping bars 3 (three in number opposite ends in the spindle and in said plate, as being shown herein) secured thereto, each bar shown in Fig. 1 of the drawings. Abase plate I6 comprising a shank 35 which is secured to the for a housing I'I is secured to the projecting end disk and a forked end 35 engaging in cam 50 of the sleeve I5, as by means of a threaded end grooves in Opposite sides 0f Chil-Ck jaws 3l slidof the sleeve engaging a threaded holein said ably mounted for radial movement in the chuck base plate, and the latter is secured to the hous- 4bOICly I3 and in a ller 38 Seeill'ed Within the ing as by means of screws or other suitable fas- Chuck body and fitting the hole therein, this tenings. A motor base I8 is secured to and closes ller being secured to the chuck body as by means 55 of screws passed through a cover ring 391 tted in a shallow recess in the end of the body, said screws passing through a lip 46 in the mouth of the opening into the chamber in the body and through a flange 4| on the periphery of the ller 38 and as shown in Fig. l of the drawings.

The cams on the forked ends 36 of the bars 34 are cooperatively so shaped that when the rod 22 is drawn backwardly the jaws will be moved radially inwardly to clamp anarticle, as a shell 42, the latter having particularly thin walls and therefore requiring that the pressure of the jaws will not be such as to deform the walls of the shell.

A complemental chuck jaw actuating disk i3 is mounted for reciprocating movement in the chuck body between the disk 33 and the cap l2, said disk having a hub 44 which is screw threadedly engaged with the forward end of the sleeve I5, as shown in Fig. 1 oi the drawings. The disk 43 has a set of jaw actuating bars 45 secured thereto and projecting therefrom, these bars being similar in construction to that already described with respeet to the bars 34 except that they are longer and have their forked ends of cam shape to engage cam shaped grooves in chuck jaws 46 mounted for radial movement in the chuck body I3 and the filler 33. The cooperating cam shaped ends of the bars engaged in the cam shaped grooves in the jaws are such that when relative movement takes place between the actuating disk l43 and the chuck body vI3 the chuck jaws 46 wiii be forced radially inward to clamp against the outer surface of the shell 42 at a distance from that engaged by the jaws 31. A bushing 4l is located within the ller 23 said bushing being slotted to receive the chuck jaws 46, the bushing being held in place as by a screw 48 threaded into the filler 38 and having a portion of its periphery engaging with a threaded recess in the side or" the bushing and as shown in dotted lines in Fig. 2 of the drawings. The Shanks 35 of the clamping bars 34 pass into enlarged -openings in the disk 43 to enable relative movement i to take place as between the disks 33 and 43.

In the operation of the device an article, as a shell 42, being placed within the opening in the bushing 41 and seated as against spring actuated plungers 49 in the hub of a plate 50 secured to the inner end of the iiller 38, as shown in Fig. l of the drawings, the motor may be started any well known manner and its operation through the connection of the train of gears will impart rotation tothe chuck jaw actuating sleeve 26, thereby rdrawing the rod 22 and with it the primary actuating disk 33 to the right as seen in Fig.V l and moving the chuck jaws 3'! inwardly against the shell 42. When the jaws are pressed against the shell 42 and resistance is thereby offered to further inward movement, continued rotation of the actuating sleeve 26 will cause the motor, the housing I1, and the base plate to be moved toward the left, thereby moving the sleeve I5 and actuating disk 43 in the same direction. This moves the jaw operating bars 45 to the left and the cooperating cam surfaces thereon acting upon the cam surfaces on the'jaws 46 move the latter radially inward until they engage with the outer surface of the shell 42. The strength of the motor will be such that when a predetermined pressure is exerted the motor will be stalled, and this will prevent undue force against the shell 42 such as would injure it by distorting its walls.

The specification sets out a rodv as a specific means for operating the actuating disks bearing the chuck jaw operating bars, reciprocating movement being imparted to said rod as by means of a screw and a screw threaded sleeve, but it will be obvious that other means for operating the disks and particularly for imparting lengthwise reciprocating movement to the rod may be employed, and we do not limit our invention to the specic means disclosed herein.

We claim:

l. A chuck including a hollow body closed at one end, rotatably mounted spindle secured to the end of sai-d body and having a recess, a Jaw operating plate located in said body and having a hub projecting into said recess, a second jaw operating plate also located in said body and having a hub projecting into a recess in the rst mentioned plate, a set of jaw actuating bars eX- tending from each of said plates, a set of jaws moiuited in said body and operatively connected with each of said sets of bars, and means actu l,

ate-d by resistance to one of said sets of jaws for moving the actuating member of the other set oi jaws into clamping action.

2. A chuck including a hollow cylindrical body, a plate removably secured to one end of the body to Iclose the chamber therein, a rotatably mounted spindle secured at its'end to said plate and having a recess therein, a jaw operating plate located in said body and having a hub projecting into said recess, a second jaw operating plate also iocated in said body and having a hub projecting into the recess in a jaw operating plate, a set of jaw actuating bars secured to the second mentioned plate and projecting iengthwise within said body, a set of jaw actuating bars secured to the first mentioned plate and projecting through openings in the second mentioned plate and along said body, a set of jaws mounted in said body and operatively connected with each of said sets of bars, and means actuated by resistance to one of said sets of jaws for moving the actuating member of the other set of jaws into clamping action.

3. A chuck including a hollow body closed at one end, arotatably mounted spindle secured to the end of said body, a jaw operating plate located in said body, a second jaw operating plate concentrically mounted with respect tol the first mentioned plate within said body, a filler 1ocated in said body and formed to provide spaces between said body and filler, a set of jaw actuating bars secured to each of said plates and projecting along said spaces, jaws operatively connected with each set of bars and mounted in said filler and body, and means actuated by resistance to o-ne of said sets of jaws for moving the actuating member of the other set of jaws into clamping action.

4. A chuck including a hollow body closed at one end,la rotatably mounted spindle secured to the end of said body, a jaw operating plate secured in said body, a second jaw operating plate concentrically mounted with respect to the rst mentioned plate within said body, a i-lller of cylindrical form located. in said body and formed toprovide spaces between said body and ller, a plate closing the end of said filler and having an opening for a hub projecting from one of said plates, a set of jaw actuating bars projecting from each of said plates along said spaces, jaws mounted in said body and filler and operatively connected with said bars, and means actuated by resistance to one of said sets of jaws for moving the actuating member of the'other set of jaws into clamping action.

5. A chuck including a hollow body closed at one end, a rotatably mounted spindle secured to the end of said body and having a recess, a jaw operating plate located in said body and'having a hub projecting into said recess, a second jaw operating plate mounted in said body and having a hub projecting into a recess in the rst mentioned plate and also having a hub projecting from its opposite side, a ller located in said body and formed to provide spaces between said body and ller and having an end with a hole to receive a hub projecting from said last mentioned plate, a set of jaw actuating bars projecting from each of said plates along said spaces, chuck jaws mounted in said body and ller and operatively connected with said bars, and means actuated by resistance to one of said sets of jaws for moving the actuating member of the other set of jaws into clamping action.

6. A chuck including a hollow body closed at one end, a rotatably mounted spindle secured to the end of said body and having a recess, a filler mounted within said body and formed to provide spaces between said body and ller, a chuck jaw actuating plate underlying said filler, a second chuck jaw actuating plate underlying the iirst mentioned plate, two sets of chuck jaws mounted at different distances from the outer end of said body and having sliding action in said body and ller, chuck jaw operating bars projecting from each of said plates along said spaces into operative engagementv with each of said sets of jaws, a sleeve secured to one of said plates and an actuating rod secured to the other of said plates, and means connected with said sleeve and bars and actuated by resistance to one of said sets of jaws for moving the actuating member of the other set of jaws into clamping action.

7. A chuck including a chuck body closed at one end, a rotatably mounted spindle secured to the closed end of said body, a ller formed to provide spaces between said body and ller, said filler being secured to said body, a jaw actuating plate underlying the end of said ller Within said body, a second jaw actuating plate underlying the first mentioned plate within said body, said plates being mutually supported one by another, a set of jaw actuating bars projecting from each of said plates along the space between said ller and body, chuck jaws slidably mounted in said body and ller and operatively connected with said bars, a bushing located within said iiller and having slots to receive said chuck jaws, an actuating sleeve secured to one of said plates and an actuating rod secured to the other of said plates, and means connected with said sleeve and rod and actuated by resistance to one of said sets of jaws for moving the actuating member of the other set of jaws into clamping action.

8. A chuck including a hollow body closed at one end, a rotatably mounted spindle secured to the end of said body, an adapted plate secured to the end of said spindle, an actuating sleeve projecting through said adapter plate, an actuating rod projecting through said sleeve, a base plate secured to the end of said sleeve, a. motor secured to said base plate, a key projecting from said base plate into a slot in said adapter plate, a chuck body secured to the end of said spindle, and sets of chuck jaws operatively mounted within said body and operatively connected with said rod and sleeve for operation thereby.

9. A chuck including a hollow body closed at one end, a rotatably mounted spindle secured to the end of said body, jaw operating plates located in said body, a filler located in said body and formed to provide spaces between said body and filler, sets of jaw actuating bars secured to said plates and projecting along said spaces, jaws operatively connected with each of said bars and mounted in said filler and body, and means actuated by resistance to one of said sets of jaws for moving the actuating member of another set of jaws into clamping action.

HARRY E. SLOAN. GEORGE A. HIGI-IBERG. 

